Finding the Third Proportional to 338,500.50 and 743,421

Step by Step Solution

1. Step 1: Write the proportion equation
   338,500.50 : 743,421 = 743,421 : x
2. Step 2: Convert to fraction form
   338,500.50/743,421 = 743,421/x
3. Step 3: Cross multiply
   338,500.50x = 743,421 × 743,421
4. Step 4: Simplify right side
   338,500.50x = 552,674,783,241
5. Step 5: Solve for x
   x = 552,674,783,241/338,500.50
6. Step 6: Final answer
   x = 1,632,714.82